ECSR dual element, time-delay fuses are recommended for AC power distribution system mains, feeders and branch circuits having inductive loads (motors, transformers) or non-inductive loads (lighting, heating) where the available short-circuit current does not exceed 200 kA RMS Sym. These "dual-element, time-delay" fuses have minimum industry standard time-delay of 10 sec at 5 times the fuse rating (8 sec minimum for 250 V, 30 A and less). The time-delay characteristics of these fuses typically allows them to be sized closer to the running amps of inductive loads to reduce cost and provide improved overcurrent protection. These fuses will override normal equipment current surges to reduce unnecessary fuse openings. They are the most popular fuses used in the industry and the most economical for most applications, especially motors and transformers. They have moderate current limitation. True dual-element construction allows sizing of 125% FLA for motor backup protection Superior overload and cycling capabilities Current limitation provides component short-circuit protection